Question

The smell of hot sizzling food reaches you several meters away, but to smell the cold food you have to go close. Why? 4 Marks

Answer 1

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♻ӇЄƦЄ ƖƧ ƳƠƲƦ ƛƝƧƜЄƦ♻
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Tʜᴇ ꜱᴍᴇʟʟ ᴏғ ʜᴏᴛ ꜱɪᴢᴢʟɪɴɢ ғᴏᴏᴅ ʀᴇᴀᴄʜᴇꜱ ʏᴏᴜ ꜱᴇᴠᴇʀᴀʟ ᴍᴇᴛʀᴇꜱ ᴀᴡᴀʏ, ʙᴜᴛ ᴛᴏ ɢᴇᴛ ᴛʜᴇ ꜱᴍᴇʟʟ ғʀᴏᴍ ᴄᴏʟᴅ ғᴏᴏᴅ ʏᴏᴜ ʜᴀᴠᴇ ᴛᴏ ɢᴏ ᴄʟᴏꜱᴇ ʙᴇᴄᴀᴜꜱᴇ ᴛʜᴇ ᴋɪɴᴇᴛɪᴄ ᴇɴᴇʀɢʏ ᴏғ ᴛʜᴇ ᴘᴀʀᴛɪᴄʟᴇꜱ ᴏғ ᴍᴀᴛᴛᴇʀ ɪɴᴄʀᴇᴀꜱᴇꜱ ᴡɪᴛʜ ᴛʜᴇ ɪɴᴄʀᴇᴀꜱᴇ ɪɴ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇ.

Answer 2

When molecules of some volatile substances from hot sizzling food diffuse into air and reach the odur sensitive part of our nose we have the perception of smell.

At higher temperature of molecules diffuse into air at a faster rate and therefore travel long distances.

Hence the smell of hot sizzling food reaches as quickly even when we are several metres away.

While on the contrary , when the food is called the vapour diffuse is at a slower rate and therefore does not travel longer distances.

So, one has to come closer to have the perception of smell.